I found the Hey there! You are using WhatsApp: Enumerating Three Billion Accounts for Security and Privacy a fascinating read. Unfortunately, it confirmed once more my perception of how Meta couldn’t care less about users' personal information. How is it possible that a single server could download all that data? Unbelievable!

Because of my love for numbers and graphs, I also spent a lot of time on the ones in the paper that, by the way, go way beyond WhatsApp. For example, the one below has to ...